Alarm device.



v A. E. 80688, i ALARM DEVICE. APPUCATION FILED FEB.3,1915.

Patented Nov. 28, 1916.

INVENTOR J Addison 30995. BY

' ATTIORNEIY 4 UNITED strArEs PATENT clar on.

ADDISON E. BOGGS, OF PITTSBURGH, PENNSYLVANIA, ASIGNOR TO WESTINGHOUSEELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

ALARM DEVICE.

To all whom it may concern Be it known that I. ADDISON E. Boone, acitizen of the United States, and a resident of Pittsburgh, in thecounty of Allegheny andv particularly to devices that indicate by eitheran audible or a visible signal, the trip- I metal having its edgesbentat right angles ping of a circuit interrupter.

The object of my invention is to provide a compact and easilyconstructed alarm-controlling device that maybe adapted to circuitinterrupters of well known construction.

The usual alarm devices for indicating the tripping of a circuitinterrupter must necessarily be set when the circuit interrupter isclosed in order that it may operate correctly upon the tripping ofthe-interrupter. Since thesetting operation is one that may be neglectedby operators, I provide a device that is automatically set when theinterrupter is closed, irrespective of the position its parts haveassumed prior to the closing operation. I further provide means formanually silencing or rendering the alarm inaudible after theinterrupter has been tripped.

Figure 1 of the accompanying drawing is a fragmentary view of a circuitinterrupter embodying my invention, and Fig. 2

' is a rear view of the alarm device shown in Fig. 1.

A bellrank lever 1 is pivotally mounted upon a pin 2 that is supportedby a bracket 3 on the frame work 4. The frame work 4:

' constitutes a part of a circuit interrupter and is mounted on aninsulating panel 5 that has an opening 6 therein in which the bracket 3is disposed. The bell-crank lever 1 constitutes the main operating leverof the circuit interrupter to which my invention is applied.

In order to indicate when the circuit interrupter has been automaticallytripped, I

provide an alarm device 7 that comprises a member 8 which is pivotallymounted, at a point 9,.on brackets 10 that project from a supportingplate 11. The plate ll'is sub stantially trapezoidal in shape and has anopening 12 therein that is formed by slitting the plate 11 and bendingportions of the same at right angles to constitute the brackets 10. Asecond bracket 13 is formed by bending a portion of the plate 11, nearits Specification of Letters Patent. Application filed February 3, 1915.Serial No. 5,877.

Patented Nov. 28, 1916.

loweredge, at right angles to itself. To this second bracket orprojection 13, is attached one end of a spring 14, theother end of Whichis attached to a similarly formedprojection 15 on the inner end of themember 8.

A member 16 is pivotally mounted at a point 17 near the outer end of themember 8 and is provided with a handle 18 for purposes hereinafter-morefully set forth. i

The member 8 consists of a flat strip of to constitutesubstantially achannel member, and is adapted to engage, at its inner end a stationarycontact terminal 19 that is sup-v ported by an insulating member 20 uponthe plate 11. A second'terminal member 21 is attached to the plate 11 bya screw 22 for the purpose of receiving a conductor. Theparts 19 and 21constitute the terminals of an annunciator circuit 23 comprising asource of electromotive force24 and a bell or other annunciator device25. The plate- 11 may either be grounded to .the frame work 4 oftheinterrupter or it may be insulated therefrom, according to whether ornot a grounded circuit is desired. i

When the lever 1 is in its lowest position, it engages the member 8 andcausesthe disengagement of the same from thei contact. terminal 19.However, when the member 1 rises, by reason of the tripping of thecircuit interrupter, the member 8 will be biased by the spring 14:intosuch position that the inner end of' the' member 8 willengage thevcon tact terminal 19, thus completing the cir-v cuit- 23 to cause thebell- 25 to operate. The. audible signal, thus given, will cause an attendant to notice the tripping ofthe circuit interrupter. In order forhim to prevent the bell from ringing further, the handle 18 7 17 willcause the member 16 to turn upon its pivotal point 17. when the member 8is moved downwardly until it assumesa position substantially parallel.to the lower portion of the member 8, as shown in the lower the panel 5by means of bolts 26 or by any other suitable means.

While I have-shown my invention in its preferred form, it is capable ofbeing variously modified, and I desire that only such limitations shallbe imposed as are set forth in the appended claims.

.I claim as my invention:

1. An alarm device for a circuit interrupter comprising a pivotallymounted arm, a member pivotally mounted on the said arm, a stationarycontact member and means for yieldingly holding the said arm inengagement \vith'the stationary contact member and the movable member ofthe circuit interrupter.

2. An alarm device for a circuit interrupter comprising a stationarycontact meniber, a main pivotally mounted arm, a second arm pivotallymounted on one end of the main arm that is adapted to engage theoperating lever arm of the circuit interrupter and means foryicldinglyholding the said mall pivotally mounted arm in engggement with thestationary contact memr and the lever arm of the circuit interrupter.

3. An alarm device for a circuit interrupter comprising a stationarycontact me libel", a main pivotally mounted arm having an auxiliary armpivotally mounted thereon, and a spring for yieldingly holding the saidmain arm in engagement with the stationary contact member and theoperatilig lever arm of the circuit interrupter, said auxiliary armbeing adapted to engage the operating lever arm of the circuitinterrupter under predetermined conditions.

4. An alarm device for a circuit interrupter comprising a stationarycontact member, a main pivoted arm having an auxiliary arm ivotedthereon, and a spring for yiel ingly holding the main arm in engagementwith the stationary contact member and the lever arm of the circuitinterrupter, said auxiliary arm being ada ted to move the main pivotedarm out o engagement with the stationary contact member when it is movedrelatively to the main pivoted arm.

5. A device for indicating the movement of a lever arm, comprising apivotally mounted arm having a pivotally mounted member thereon, astationary contact terminal, and a resilient member for effecting theengagement of the contact terminal and the pivotally mounted arm underpredetermined conditions and for maintaining the pivotally mountedmember in engagement ed on the pivotedarm and having a handle thereon, astationary contact member and means for yieldingly holding the pivotedarm in engagement with the movable member and the stationary contactmember, said pivoted member being adapted-to eflect disengagement of thecontact member audthe pivoted arm when it is turned.

In testimony whereof, I have hereunto subscribed my name this 30th dayof- Jan., 1915.

ADDISON E. BOGGS.

Witnesses:

ALvix \V. Mrurrra, B. B. HINES.

